17.38% is the change from 420 to 493
Calculation steps:
[( 493 - 420 ) ÷ 420] x 100 = 17.38%
Formula
Percentage change = [(493 - 420) / 420] x 100
Subtract the new number by the original number
493 - 420 = 73
73 ÷ 420 = 0.1738095238095238
0.1738095238095238 x 100 = 17.38%